A super fun dance, (sometimes around the same time as prom). It is the word "Prom"spelled backwards and that is just what it is. A backwards prom. Instead of dressing super fancy and such, one would dress really crazy and fun. Most Morps are 80s themed or you just wear mismatched, bright, crazy, fun outfits and look like a total goof ball. It's lots of fun no matter what grade you are in.

Adri: Hey, Barbara. Do you have your MORP outfit yet?

Barbara: Not yet, I'm going to go to New To You later and look for something sparkly to go with my metallic spandex

A variant definition of the word morp is, since it is prom spelled backwards, what people do instead of going to prom. Such things include playing CoD or Halo all night, going out and having a few beers, or just sitting at home and watching TV. This is generally not a cool thing to do... EVER.